Mitsubishi Electric PUMY-P36NKMU4 Technical & Service Manual page 135

Minimum wire thickness (mm
Total operating current
of the indoor unit Main Cable
F0 = 15 A or less *2 2.1/14
F0 = 20 A or less *2 3.3/12
F0 = 30 A or less *2 5.3/10
Apply to IEC61000-3-3 about max. permissive system impedance.
*1 The Ground-fault interrupter should support inverter circuit.
The Ground-fault interrupter should combine using of local switch or wiring breaker.
*2 Please take the larger of F1 or F2 as the value for F0.
F1 = Total operating maximum current of the indoor units × 1.2
F2 = {V1 × (Quantity of Type1)/C} + {V1 × (Quantity of Type2)/C} + {V1 × (Quantity of Type3)/C} + {V1 × (Quantity of Type4)/C} + ... + {V1 × (Quantity of Type12)/C}
Type 1 PEAD-A·AA, SVZ-KP·NA, PAA-A·A
Type 2 PLA-A·EA, SEZ-KD·NA
Type 3 SLZ-KF·NA
Type 4 MLZ-KP·NA(2)
Type 5 MFZ-KJ·NA, MSZ-GL·NA, MSZ-FS·NA, MSZ-GS·NA, MLZ-KY·NA
Type 6 MSZ-FH·NA, MSZ-FH·NA2, MSZ-EF·NAW(B)(S)-U1
Type 7 Branch box
Type 8 PEFY-P·NMAU-E3, PVFY-P·NAMU
PKFY-P·NKMU, PEFY-P·NMSU, PCFY-P·NKMU,
Type 9
PLFY-EP·NEMU, PLFY-P·NFMU, PMFY-P·NBMU, PKFY-P·NLMU
Type 10 PEFY-P·NMHU, PFFY-P·NEMU, PFFY-P·NRMU
Type 11 PEFY-P·NMHSU (connected to PUMY-P60 only)
Type 12 PEFY-P·NMAU-E4
C: Multiple of tripping current at tripping time 0.01s
Please pick up "C" from the tripping characteristic of the breaker.
<Example of "F2" calculation>
• Condition PEFY-NMSU × 4 + PEFY-NMAU × 1, C = 8 (refer to right sample chart)
F2 = 19.8 × 4/8 + 38 × 1/8
= 14.65
→ 16 A breaker (Tripping current = 8 × 16 A at 0.01 s)
*3 Current sensitivity is calculated using the following formula.
G1 = V2 × (Quantity of Type1) + V2 × (Quantity of Type2) + V2 × (Quantity of Type3) +...
+ V2 × (Quantity of Type12) + V3 × (Wire length [km])
G1
30 or less
100 or less
Wire thickness (mm
2
2.1/14
3.3/12
5.3/10
1. Use a separate power supply for the outdoor unit and indoor unit.
2. Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker consideration of voltage drops.
Make sure the power-supply voltage does not drop more than 10%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 60245 IEC57).
For example, use wiring such as YZW.
6. Install an earth line longer than power cables.
9-3. DESIGN FOR CONTROL WIRING
Please note that the types and numbers of control wires needed by MULTI-S series depend on the remote controllers
and whether they are linked with the system or not.
9-3-1. Selection number of control wires
Remote controller → indoor unit
Wires connecting → indoor units
Wires connecting → indoor units with outdoor unit
Wires connecting → outdoor units
OCH811A
/AWG)
2
Branch Ground
2.1/14 2.1/14
3.3/12 3.3/12
5.3/10 5.3/10
Indoor unit
Current sensitivity
30 mA 0.1 second or less
100 mA 0.1 second or less
/AWG) V3
48
56
66
Use
Ground-fault interrupter
(If you use)
15 A current sensitivity
20 A current sensitivity
30 A current sensitivity
V1 V2
26.9
19.8
17.1
2.4
9.9
7.4
6.8
5.1 3.0
38.0 1.6
19.8 2.4
0.0 0.0
13.8 4.8
18.6 3.0
M-NET remote controller
Remote controller used in system control operations
• Group operation involving different refrigerant systems
• Linked operation with upper control system
2-core wire (non-polar)
135
Local switch (A)
Breaker for wiring
*1
Capacity Fuse
*3 15 15
*3 20 20
*3 30 30
Sample chart
6000
600
SAMPLE
60
10
1
0.1
0.01
1 2 3 4 6
C
Rated Tripping current (x)
(NFB)
15
20
30
8 10 20